01
Technical deep dives
Step-by-step explanations of the T4’s systems: injection, cooling, transmission, conversions. When a single forum topic is not enough, here you find the organised, illustrated version.
Guides · built on the forum
The T4 guides, written properly.
This is where in-depth technical articles will end up, along with the list of known faults by model, the must-have fixes for the most common breakdowns and the practical tutorials for doing yourself the work you can do yourself. The idea is clear, the pages are coming over the next few months.
Section still being tested
This section is still experimental too. The goal is to turn the fixes the community has already found on the forum into organised, illustrated guides: technical deep dives, known faults by model and engine, step-by-step procedures to follow in the garage.
The guides you find online right now are few, partial and in part only text samples: they are there to show the format, not the finished archive. If you have one to share, now is the right moment.
01 — What you will find here
Four kinds of content.
No generic articles, no clickbait. Only material useful to someone who actually drives a T4 — meant to be searched, quoted and reused over time.
02
Known faults
The list of recurring failures by model and engine, with symptoms, the most likely causes and what to check first. No diagnosing in the dark: you start from what has already happened to dozens of others.
03
Must-haves: problem → fix
The definitive answers to the most common problems. No waffle, no «let me try and see»: the procedure that works, the compatible parts, the before and after photos.
04
Practical tutorials
Maintenance jobs and small repairs anyone can do in their own garage, with the right tools. Time, cost and difficulty stated up front.
02 — Take part
We write this section together.
Nobody knows the T4 better than the people who have actually had their hands on one. If you have solved a problem, stripped a component, found the right part after weeks of searching — that knowledge is needed by whoever comes after you.
Got a guide
Share it on the forum.
Open a topic in the technical section of the forum with text, photos and — if you have one — a video. We will move it over here keeping the original author credited.
Got an idea
Suggest us a topic.
Know what is missing? Which problem should be documented first? Write to us on Telegram or open a proposal thread on the forum: let us draw up the list together.
Just want to help
Proofread, correct, illustrate.
We are also looking for people who can proofread well, take clean photos of a stripped component, draw sketches or diagrams. Everything counts, nothing goes to waste.
Philosophy
You learn by taking things apart. You help by writing it down.